Across
- 2. third step of coal formation
- 7. energy that will run out
- 9. energy is created, such as oil or coil
- 10. mining with mountaintop removal, strip mining
- 13. first step of coal formation
- 14. percent of USA wold energy consumption
- 15. quantitative property that must be transferred to an object in order to perform work on
Down
- 1. energy is created naturally, for example by movement
- 3. country where most of Ecuador's oil goes
- 4. mining with minimal effects on the surface, solid degradation
- 5. sector that most energy consumes
- 6. most concentrated coal
- 8. economies that most energy consumes
- 11. most abundant fossil fuel
- 12. energy that will not run out